SAX方式创建/解析xml

1.新建文件名为：Saxdemo.java，代码：

package com.test;
 
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
 
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
 
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
 
import com.inter.XmlDocument;
 
public class SaxDemo implements XmlDocument
{
 
    public void createXml(String fileName)
    {
        System.out.println("<<" + fileName + ">>");
    }
 
    public void parserXml(String fileName)
    {
        SAXParserFactory saxfac = SAXParserFactory.newInstance();
        try
        {
            SAXParser saxparser = saxfac.newSAXParser();
            InputStream is = new FileInputStream(fileName);
            saxparser.parse(is,new MySAXHandler());
        }
        catch (ParserConfigurationException e)
        {
            e.printStackTrace();
        }
        catch (SAXException e)
        {
            e.printStackTrace();
        }
        catch (FileNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        System.out.println("-----sax解析完毕------");
    }
}
 
class MySAXHandler extends DefaultHandler
{
    boolean hasAttribute = false;
    Attributes attributes = null;
 
    public void startDocument() throws SAXException
    {
        System.out.println("开始打印");
    }
 
    public void endDocument() throws SAXException
    {
        System.out.println("结束打印");
    }
 
    public void startElement(String uri,String localName,String qName,Attributes attributes) throws SAXException
    {
        if (qName.equals("employees"))
        {
            return;
        }
        if (qName.equals("employee"))
        {
            System.out.println(qName);
        }
        if (attributes.getLength() > 0)
        {
            this.attributes = attributes;
            this.hasAttribute = true;
        }
    }
 
    public void endElement(String uri,String qName)
            throws SAXException
    {
        if (hasAttribute && (attributes != null))
        {
            for (int i = 0; i < attributes.getLength(); i++)
            {
                System.out.println(attributes.getQName(0)
                        + attributes.getValue(0));
            }
        }
    }
 
    public void characters(char[] ch,int start,int length)
            throws SAXException
    {
        System.out.println(new String(ch,start,length));
    }
}

2.编写测试类，TestSax.java，代码如下：

public class TestDom
{
    public static void main(String[] args)
    {
Saxdemo    sax  =  new  Saxdemo();
 
//创建的xml见图一
sax.createXml("D://employee.xml");
//解析的xml见图二
sax.parseXml("E://employee.xml");
 
 
          }
}

（编辑：李大同）

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